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Summary Mitose

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Hierdie opsomming bevat volledige verduidelikings en beskrywings van die Lewenswetenskap-hoofstuk genaamd “Mitose”.Die opsomming bevat kleurvolle prente en illustrasies wat die leerwerk ń bietjie meer interessant maak.

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mitose

selsiklus - begin as sel vorm en eindig as volwasse sel verdeel

STRUKTUUR VAN GEREPLISEERDE CHROMOSOOM



ongerepliseer p-arm
net 1 kant

sentromeer


gerepliseer q-arm




chromatied

NUKLEUS TOT DNA

basis paar
DNA -
chromosoom dubbel heliks

nukleus
histoon
telomeer
proteïene

, chromosoom

>’n Chromosoom bestaan uit 'n baie lang DNA-draad wat om histoonproteiene
gedraai is.
>Tydens DNA-replisering maak die DNA 'n presiese replika van homself.
>Elke chromosoom bestaan dan uit twee chromatiede wat deur 'n sentromeer
verbind word.
>Voor DNA-replisering het 'n chromosoom ‘n enkeldraadstruktuur en na DNA-
replisering 'n dubbeldraadstruktuur.


Mitose Funksies
*Mitose is die tipe seldeling wat nodig is om nuwe selle te vervaardig vir:
>Groei,
>Herstel van verslete weefsel,
. Ongeslagtelike voortplanting, ni.
>Vegetatiewe voortplanting by plante deur steggies te maak.
>Tweedeling by bakterlee en eensellige protiste.


interfase
- die fase tussen opeenvolgende seldelings, waartydens in nuwe sel groter
groei, metabolies aktief is ( proteiensintese) en DNS- replisering plaasvind

stadiums van veroudering
G0 =mitose pas volooi ( 2 selle is gevorm uit een )-1 sel differensieer(klaar)
G1= vergaande selorgane vorm weer, behalwe chromosome
S= chromosome se DNS repliseer om gerepliseerde chromosome te vorm
G2= sel kontroleer replisering en herstel nukleotied volgorde (deel weer)

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Uploaded on
July 15, 2026
Number of pages
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Written in
2024/2025
Type
SUMMARY

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